63625555655 has 32 divisors (see below), whose sum is σ = 78745793280. Its totient is φ = 49324101120.

The previous prime is 63625555613. The next prime is 63625555657. The reversal of 63625555655 is 55655552636.

It is not a de Polignac number, because 63625555655 - 2¹⁰ = 63625554631 is a prime.

It is a super-2 number, since 2×63625555655² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63625555597 and 63625555606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63625555657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14661476 + ... + 14665814.

It is an arithmetic number, because the mean of its divisors is an integer number (2460806040).

Almost surely, 2^63625555655 is an apocalyptic number.

63625555655 is a deficient number, since it is larger than the sum of its proper divisors (15120237625).

63625555655 is a wasteful number, since it uses less digits than its factorization.

63625555655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911.

The product of its digits is 20250000, while the sum is 53.

The spelling of 63625555655 in words is "sixty-three billion, six hundred twenty-five million, five hundred fifty-five thousand, six hundred fifty-five".